Rely on regular "expected"/"found" parser error for fn

src/test/ui/issues/issue-39616.rs

@@ -1,4 +1,4 @@
 fn foo(a: [0; 1]) {} //~ ERROR expected type, found `0`
-//~| ERROR expected `;` or `{`, found `]`
+//~| ERROR expected one of `)`, `,`, `->`, `;`, `where`, or `{`, found `]`
 
 fn main() {}

src/test/ui/issues/issue-39616.stderr

@@ -4,11 +4,11 @@ error: expected type, found `0`
 LL | fn foo(a: [0; 1]) {}
    |            ^ expected type
 
-error: expected `;` or `{`, found `]`
+error: expected one of `)`, `,`, `->`, `;`, `where`, or `{`, found `]`
   --> $DIR/issue-39616.rs:1:16
    |
 LL | fn foo(a: [0; 1]) {}
-   |                ^ expected `;` or `{`
+   |                ^ expected one of `)`, `,`, `->`, `;`, `where`, or `{`
 
 error: aborting due to 2 previous errors
 

src/test/ui/issues/issue-58856-1.rs

@@ -2,7 +2,7 @@ impl A {
     //~^ ERROR cannot find type `A` in this scope
     fn b(self>
     //~^ ERROR expected one of `)`, `,`, or `:`, found `>`
-    //~| ERROR expected `;` or `{`, found `>`
+    //~| ERROR expected one of `->`, `;`, `where`, or `{`, found `>`
 }
 
 fn main() {}

src/test/ui/issues/issue-58856-1.stderr

@@ -6,14 +6,14 @@ LL |     fn b(self>
    |         |
    |         unclosed delimiter
 
-error: expected `;` or `{`, found `>`
+error: expected one of `->`, `;`, `where`, or `{`, found `>`
   --> $DIR/issue-58856-1.rs:3:14
    |
 LL | impl A {
    |        - while parsing this item list starting here
 LL |
 LL |     fn b(self>
-   |              ^ expected `;` or `{`
+   |              ^ expected one of `->`, `;`, `where`, or `{`
 ...
 LL | }
    | - the item list ends here

src/test/ui/parser/fn-colon-return-type.rs

@@ -0,0 +1,5 @@
+fn foo(x: i32): i32 { //~ ERROR expected one of `->`, `;`, `where`, or `{`, found `:`
+    x
+}
+
+fn main() {}

src/test/ui/parser/fn-colon-return-type.stderr

@@ -0,0 +1,8 @@
+error: expected one of `->`, `;`, `where`, or `{`, found `:`
+  --> $DIR/fn-colon-return-type.rs:1:15
+   |
+LL | fn foo(x: i32): i32 {
+   |               ^ expected one of `->`, `;`, `where`, or `{`
+
+error: aborting due to previous error
+

src/test/ui/parser/issue-24780.rs

@@ -3,6 +3,6 @@
 // expected one of ..., `>`, ... found `>`
 
 fn foo() -> Vec<usize>> {
-    //~^ ERROR expected `;` or `{`, found `>`
+    //~^ ERROR expected one of `!`, `+`, `::`, `;`, `where`, or `{`, found `>`
     Vec::new()
 }

src/test/ui/parser/issue-24780.stderr

@@ -1,8 +1,8 @@
-error: expected `;` or `{`, found `>`
+error: expected one of `!`, `+`, `::`, `;`, `where`, or `{`, found `>`
   --> $DIR/issue-24780.rs:5:23
    |
 LL | fn foo() -> Vec<usize>> {
-   |                       ^ expected `;` or `{`
+   |                       ^ expected one of `!`, `+`, `::`, `;`, `where`, or `{`
 
 error: aborting due to previous error
 

src/test/ui/parser/issue-6610.rs

@@ -1,3 +1,3 @@
-trait Foo { fn a() } //~ ERROR expected `;` or `{`, found `}`
+trait Foo { fn a() } //~ ERROR expected one of `->`, `;`, `where`, or `{`, found `}`
 
 fn main() {}

src/test/ui/parser/issue-6610.stderr

@@ -1,10 +1,10 @@
-error: expected `;` or `{`, found `}`
+error: expected one of `->`, `;`, `where`, or `{`, found `}`
   --> $DIR/issue-6610.rs:1:20
    |
 LL | trait Foo { fn a() }
    |           -        ^
    |           |        |
-   |           |        expected `;` or `{`
+   |           |        expected one of `->`, `;`, `where`, or `{`
    |           |        the item list ends here
    |           while parsing this item list starting here
 

src/test/ui/parser/missing_right_paren.stderr

@@ -22,11 +22,11 @@ error: expected one of `:` or `|`, found `)`
 LL | fn main((ؼ
    |           ^ expected one of `:` or `|`
 
-error: expected `;` or `{`, found `<eof>`
+error: expected one of `->`, `;`, `where`, or `{`, found `<eof>`
   --> $DIR/missing_right_paren.rs:3:11
    |
 LL | fn main((ؼ
-   |           ^ expected `;` or `{`
+   |           ^ expected one of `->`, `;`, `where`, or `{`
 
 error: aborting due to 4 previous errors
 

src/test/ui/parser/not-a-pred.rs

@@ -1,6 +1,5 @@
-// error-pattern: lt
-
 fn f(a: isize, b: isize) : lt(a, b) { }
+//~^ ERROR expected one of `->`, `;`, `where`, or `{`, found `:`
 
 fn lt(a: isize, b: isize) { }
 

src/test/ui/parser/not-a-pred.stderr

@@ -1,8 +1,8 @@
-error: expected `;` or `{`, found `:`
-  --> $DIR/not-a-pred.rs:3:26
+error: expected one of `->`, `;`, `where`, or `{`, found `:`
+  --> $DIR/not-a-pred.rs:1:26
    |
 LL | fn f(a: isize, b: isize) : lt(a, b) { }
-   |                          ^ expected `;` or `{`
+   |                          ^ expected one of `->`, `;`, `where`, or `{`
 
 error: aborting due to previous error